Polymer 1.0 postMessage

[eric sherouse]

Hello,

I am migrating my app from Polymer 0.5 to 1.0. I have an element with an embed tag in it (used to communicate with a Native Client module actually).

<embed id="theThing" src="{{nmf}}" type="application/x-pnacl" on-load="loaded" on-message="receive">

In 0.5, I was able to use postMessage to communicate with this embed element like this:

this.$.theThing.postMessage()

In 1.0, it appears I can no longer access the postMessage method (it is undefined). I have tried multiple element selector variations:

Polymer.dom(this.$.theThing).postMessage(); //does not work
this.$$("#theThing").postMessage(); //does not work
Polymer.dom(this.root).querySelector("#theThing").postMessage(); //does not work

Is there a new way to access these sorts of methods? If this is described in the docs, I have missed it so far. Any thoughts would be appreciated.

Thanks,

Eric

[Eric Bidelman]

Did you try just this.$.theThing.postMessage()? Since that node is local to your element's DOM, you shouldn't need the Polymer.dom() wrappers. Those are mainly for cases where you're manipulating the light DOM of an element and doing

things that could affect distribution.

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[eric sherouse]

Thanks for the quick reply. Yes, I also tried this.$.theThing.postMessage(), and it does not work either.

[eric sherouse]

FYI, I just looked at this again. The problem was that I was trying to call the postMessage() function before the local DOM was ready. Basic.

Eric